The Johannesburg Zoo has thousands of mammals, birds and reptiles. Lions, elephants, giraffes, and large apes are only divided by trenches and are completely free of iron railings, making them popular with tourists. In addition, the newly designed polar bear habitat, the large bird cage for people to walk around, is also popular with tourists. The Midlands, located in the Johannesburg area, has a Transvaal Snake Park, which displays a wide variety of African snakes. The setting is very attractive and has displays that show visitors how to extract poisonous venom.